162. 7564-!-item-!-187;#058&005577 Alice's take-home pay last year was the same each month, and she saved the same fraction of her take-home pay each month. The total amount of money that she had saved at the end of the year was 3 times the amount of that portion of her monthly take-home pay that she did not save. If all the money that she saved last year was from her take-home pay, what fraction of her take-home pay did she save each month?
答案是:1/5
答案是:1/5 请高人指点吧~下面还有一提
请高人指点吧~下面还有一提
175. 18356-!-item-!-187;#058&011490 Before being simplified, the instructions for computing income tax in Country R were to add 2 percent of one's annual income to the average (arithmetic mean) of 100 units of Country R's currency and 1 percent of one's annual income. Which of the following represents the simplified formula for computing the income tax, in Country R's currency, for a person in that country whose annual income is I ?
答案是:50+I/40 一样是搞不懂啦.希望有人能帮忙啦 | 
